CN218939296U

CN218939296U - Flame-retardant fire-resistant power cable

Info

Publication number: CN218939296U
Application number: CN202222858472.3U
Authority: CN
Inventors: 魏海波; 陈言省
Original assignee: Yanggu East China Special Cable Co ltd
Current assignee: Yanggu East China Special Cable Co ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-04-28
Anticipated expiration: 2032-10-28

Abstract

The utility model relates to the field of wires and cables, and discloses a flame-retardant and fire-resistant power cable, which comprises a conductor, an insulating layer arranged at a radial outer position relative to the conductor, a filling layer arranged at a radial outer position relative to the insulating layer, a fire-resistant layer arranged at a radial outer position relative to the filling layer, and an outer coating layer arranged at a radial outer position relative to the fire-resistant layer. According to the flame-retardant and fire-resistant power cable, the isolation assembly is arranged at the outermost part of the cable, the isolation assembly is arranged at a position where the cable is easy to generate fire, when an external fire source contacts the cable, the isolation assembly at the outermost layer contacts the fire source preferentially, under the combustion of open fire, the two groups of rubber rings are melted rapidly, the isolation assembly is released from limitation, falls under the action of gravity, and is separated from the cable with the fire source, so that the cable has a fireproof protection function, and the cable is filled with mica tapes, so that the cable has excellent high-temperature resistance and combustion resistance.

Description

Flame-retardant fire-resistant power cable

Technical Field

The utility model relates to the field of wires and cables, in particular to a flame-retardant and fire-resistant power cable.

Background

The wire and cable is used for transmitting electric (magnetic) energy, information and realizing wire products of electromagnetic energy conversion, and the generalized wire and cable is also called cable for short, so that the industries of electric power, railway, rail transit, energy, construction, ships, automobiles and the like in China still keep a large investment scale at present, and a plurality of difficulties are provided for the wire and cable industry.

When the existing power cable is used, once a fire disaster occurs, the fire disaster is fierce, the fire disaster spreads rapidly, and the fire fighting is difficult, so that the fireproof and fire-resistant functions of the cable are particularly important.

Disclosure of Invention

(one) solving the technical problems

Aiming at the defects of the prior art, the utility model provides a flame-retardant and fire-resistant power cable which has the advantages of separating fire sources and high fire resistance so as to solve the problems.

(II) technical scheme

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a fire-retardant fire-resistant power cable, includes the conductor to and the insulating layer of radial outside position is arranged for the conductor, the filling layer of radial outside position is arranged for the insulating layer, the flame retardant coating of radial outside position is arranged for the filling layer, the outer cladding of radial outside position is arranged for the flame retardant coating, the outer wall of outer cladding is provided with first isolation sheath and second isolation sheath, the second isolation sheath is located one side of first isolation sheath, first locking ring and second locking ring have been cup jointed to the outer wall of first isolation sheath, the second locking ring is located the rear end of first locking ring.

Preferably, the first isolation sheath and the second isolation sheath are semi-circular, and the first isolation sheath and the second isolation sheath are spliced into a complete isolation sheath.

Preferably, the first locking ring and the second locking ring are respectively arranged at two ends of the isolation sheath, and the areas of the outer ring of the isolation sheath and the inner ring of the first locking ring and the second locking ring are the same.

Preferably, the first locking ring and the second locking ring are both styrene-butadiene rubber.

Preferably, the fire-resistant layer is a mica tape, and the outer cladding layer is a polyvinyl chloride sheath.

Preferably, the insulating layer is made of polyethylene extruded plastic, and an insulating shield is arranged on the outer wall of the insulating layer.

(III) beneficial effects

Compared with the prior art, the utility model provides a flame-retardant and fire-resistant power cable, which comprises the following components

The beneficial effects are that:

this fire-retardant fire-resistant power cable sets up isolation component in the outside of cable, sets up isolation component in the position that the cable takes place the fire easily, when outside fire source contact cable, the first contact fire source of outermost isolation component, under the burning of naked light, two sets of rubber rings melt rapidly, isolation component removes the restriction, drops under the effect of gravity, takes the fire source to break away from the cable to play fire protection function to the cable, secondly the cable is filled by the mica tape, has good high temperature resistance and fire resistance.

Drawings

FIG. 1 is a schematic view of the overall structure of a flame retardant and fire resistant power cable of the present utility model;

FIG. 2 is an exploded view of a flame retardant and fire resistant power cable of the present utility model;

fig. 3 is a schematic view showing the separation of the insulation sheath of the flame-retardant and fire-resistant power cable after encountering a fire.

In the figure: 1. a conductor; 2. an insulating layer; 3. a filling layer; 4. a refractory layer; 5. an outer cape layer; 6. a first isolation sheath; 7. a second isolation sheath; 8. a first locking ring; 9. a second locking ring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 3, a flame-retardant and fire-resistant power cable comprises a conductor 1 made of copper, and an insulating layer 2 arranged at a radially outer position relative to the conductor 1, wherein the insulating layer 2 is a necessary basic member for forming the cable, and ensures that current or electromagnetic waves and light waves transmitted by the conductor 1 only propagate along the conductor and do not flow to the outside, and simultaneously ensures the safety of external objects and personnel, a filling layer 3 arranged at a radially outer position relative to the insulating layer 2, a fire-retardant layer 4 arranged at a radially outer position relative to the filling layer 3, an outer cladding 5 arranged at a radially outer position relative to the fire-retardant layer 4, and the fire-retardant layer 4 is a mica tape, has excellent high temperature resistance and combustion resistance, the outer cladding 5 is a polyvinyl chloride sheath, has the advantages of flame retardance, high chemical resistance, good mechanical strength and good electrical insulation, the insulating layer 2 is polyethylene extruded plastic, and has excellent electrical properties, moisture resistance, cold resistance and medium mechanical properties, and the outer wall of the insulating layer 2 is provided with insulation shielding.

The outer wall of the outer cape layer 5 is provided with a first isolation sheath 6 and a second isolation sheath 7, the second isolation sheath 7 is positioned on one side of the first isolation sheath 6, the outer wall of the first isolation sheath 6 is sleeved with a first locking ring 8 and a second locking ring 9, the second locking ring 9 is positioned at the rear end of the first locking ring 8, the first isolation sheath 6 and the second isolation sheath 7 are semicircular, the first isolation sheath 6 and the second isolation sheath 7 are spliced into a complete isolation sheath, the first locking ring 8 and the second locking ring 9 are respectively arranged at two ends of the isolation sheath, the inner ring areas of the outer ring of the isolation sheath and the inner ring areas of the first locking ring 8 and the second locking ring 9 are the same, the first locking ring 8 and the second locking ring 9 are both made of styrene-butadiene rubber, the isolation sheath is arranged at a position where fire easily occurs on a cable, when an external fire source contacts the cable, two groups of rubber rings are rapidly melted under the combustion of open fire, the isolation sheath is released from limitation, the isolation sheath is separated into the first isolation sheath 6 and the second isolation sheath 7, and the first isolation sheath 6 and the second isolation sheath 7 are separated from the cable under the action of the effect of the heavy fire source, so that the fire protection function is achieved.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Flame-retardant and fire-resistant power cable comprising a conductor (1), and an insulating layer (2) arranged in a radially outer position with respect to the conductor (1), a filler layer (3) arranged in a radially outer position with respect to the insulating layer (2), a fire-resistant layer (4) arranged in a radially outer position with respect to the filler layer (3), an outer jacket (5) arranged in a radially outer position with respect to the fire-resistant layer (4), characterized in that: the outer wall of the outer cape layer (5) is provided with a first isolation sheath (6) and a second isolation sheath (7), the second isolation sheath (7) is positioned on one side of the first isolation sheath (6), the outer wall of the first isolation sheath (6) is sleeved with a first locking ring (8) and a second locking ring (9), and the second locking ring (9) is positioned at the rear end of the first locking ring (8).

2. A flame retardant and fire resistant power cable according to claim 1, wherein: the first isolation sheath (6) and the second isolation sheath (7) are semicircular, and the first isolation sheath (6) and the second isolation sheath (7) are spliced into a complete isolation sheath.

3. A flame retardant and fire resistant power cable according to claim 2, wherein: the first locking ring (8) and the second locking ring (9) are respectively arranged at two ends of the isolation sheath, and the areas of the outer ring of the isolation sheath and the inner ring of the first locking ring (8) and the second locking ring (9) are the same.

4. A flame retardant and fire resistant power cable according to claim 3, wherein: the first locking ring (8) and the second locking ring (9) are made of styrene-butadiene rubber.

5. A flame retardant and fire resistant power cable according to claim 1, wherein: the fire-resistant layer (4) is a mica tape, and the outer cladding layer (5) is a polyvinyl chloride sheath.

6. A flame retardant and fire resistant power cable according to claim 1, wherein: the insulating layer (2) is made of polyethylene extrusion plastic, and an insulating shield is arranged on the outer wall of the insulating layer (2).